We had a long steady lock stretch this morning so I'm looking at the coherences between the ReflA signals and HAM1 HEPI motion.  Jeff & Sheila report coherences at 5-7hz and the microseism.

Attached are HAM1 IPS and L4C coherence plots with REFL_A_RF9_I. I wasn't going to mess with the IPS but I chose that channel and did not notice until I had produced the plot so I include it.  Both sensors see plenty of coherence at both microseisms with narrower bands around 5 to 10hz.  There is also L4C coherence between 2 & 400mhz in X & Z.  Almost all DOFs show some coherence with both Pitch & Yaw.  I'm having trouble wrapping my head around what coherence with the IPS means.  The platform is moving relative to the ground to make IPS signal.  We should be well locked to the ground with the position only isolation loops at the microseism but does that mean we are too locked or not locked hard enough to the ground.  Inertial sensors are so nice.

I see now Jeff included REFL B.  I did not include these signals.